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  <dxl:Comment><![CDATA[
    Objective: Given a partitioned AO table containing btree index, ORCA is
    allowed to consider a bitmap index scan using the *btree* index. Normally
    bitmap indexes have an overhead associated bitmap page cost, but not in
    this case. And in this case, if we incorrectly consider bitmap page cost
    then we pick a seq scan plan. Instead we should ignore bitmap page cost
    and subsequently pick bitmap scan plan.

    CREATE TABLE test_partitioned (a integer not null, b text, c text) WITH (appendonly=true) DISTRIBUTED BY (b)
    PARTITION BY RANGE (a) (
      PARTITION p_pos START(0) END (1000000001),
      PARTITION p_neg START(-1000000000) END (0)
    );

    INSERT INTO test_partitioned SELECT a, a::text, a::text FROM generate_series(1, 10000000) a;
    INSERT INTO test_partitioned SELECT -1 * a, a::text, a::text FROM generate_series(1, 10000000) a;

    CREATE TABLE batch (LIKE test_partitioned) DISTRIBUTED BY (b);
    INSERT INTO batch SELECT * FROM test_partitioned WHERE random() < .00001;
    ANALYZE batch;

    CREATE INDEX idx_test_partitioned ON test_partitioned(a);
    ANALYZE test_partitioned;

    EXPLAIN SELECT count() FROM test_partitioned a WHERE EXISTS (SELECT 1 FROM batch b WHERE a.a = b.a);
                                                               QUERY PLAN
    -------------------------------------------------------------------------------------------------------------------------------------
     Aggregate  (cost=0.00..831.36 rows=1 width=8)
       ->  Gather Motion 3:1  (slice3; segments: 3)  (cost=0.00..831.36 rows=1 width=8)
             ->  Aggregate  (cost=0.00..831.36 rows=1 width=8)
                   ->  Nested Loop  (cost=0.00..831.36 rows=67 width=1)
                         Join Filter: true
                         ->  Broadcast Motion 3:3  (slice2; segments: 3)  (cost=0.00..431.03 rows=200 width=4)
                               ->  HashAggregate  (cost=0.00..431.01 rows=67 width=4)
                                     Group Key: batch.a
                                     ->  Redistribute Motion 3:3  (slice1; segments: 3)  (cost=0.00..431.00 rows=67 width=4)
                                           Hash Key: batch.a
                                           ->  Result  (cost=0.00..431.00 rows=67 width=4)
                                                 ->  Result  (cost=0.00..431.00 rows=67 width=4)
                                                       ->  Seq Scan on batch  (cost=0.00..431.00 rows=67 width=4)
                         ->  Sequence  (cost=0.00..400.33 rows=1 width=4)
                               ->  Partition Selector for test_partitioned (dynamic scan id: 1)  (cost=10.00..100.00 rows=34 width=4)
                                     Partitions selected: 2 (out of 2)
                               ->  Dynamic Bitmap Heap Scan on test_partitioned (dynamic scan id: 1)  (cost=0.00..400.33 rows=1 width=4)
                                     Recheck Cond: (a = batch.a)
                                     ->  Dynamic Bitmap Index Scan on idx_test_partitioned  (cost=0.00..0.00 rows=0 width=0)
                                           Index Cond: (a = batch.a)
     Optimizer: Pivotal Optimizer (GPORCA)
    (21 rows)
  ]]>
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                  <dxl:Filter/>
                  <dxl:RecheckCond>
                    <dxl:Comparison ComparisonOperator="=" OperatorMdid="0.96.1.0">
                      <dxl:Ident ColId="0" ColName="a" TypeMdid="0.23.1.0"/>
                      <dxl:Ident ColId="6" ColName="a" TypeMdid="0.23.1.0"/>
                    </dxl:Comparison>
                  </dxl:RecheckCond>
                  <dxl:BitmapIndexProbe>
                    <dxl:IndexCondList>
                      <dxl:Comparison ComparisonOperator="=" OperatorMdid="0.96.1.0">
                        <dxl:Ident ColId="0" ColName="a" TypeMdid="0.23.1.0"/>
                        <dxl:Ident ColId="6" ColName="a" TypeMdid="0.23.1.0"/>
                      </dxl:Comparison>
                    </dxl:IndexCondList>
                    <dxl:IndexDescriptor Mdid="0.24718.1.0" IndexName="test_partitioned_1_prt_p_neg_a_idx"/>
                  </dxl:BitmapIndexProbe>
                  <dxl:TableDescriptor Mdid="6.24673.1.0" TableName="test_partitioned">
                    <dxl:Columns>
                      <dxl:Column ColId="0" Attno="1" ColName="a" TypeMdid="0.23.1.0" ColWidth="4"/>
                      <dxl:Column ColId="1" Attno="2" ColName="b" TypeMdid="0.25.1.0" ColWidth="7"/>
                      <dxl:Column ColId="3" Attno="-1" ColName="ctid" TypeMdid="0.27.1.0" ColWidth="6"/>
                      <dxl:Column ColId="4" Attno="-7" ColName="tableoid" TypeMdid="0.26.1.0" ColWidth="4"/>
                      <dxl:Column ColId="5" Attno="-8" ColName="gp_segment_id" TypeMdid="0.23.1.0" ColWidth="4"/>
                    </dxl:Columns>
                  </dxl:TableDescriptor>
                </dxl:DynamicBitmapTableScan>
              </dxl:Sequence>
              <dxl:NLJIndexParamList>
                <dxl:NLJIndexParam ColId="6" ColName="a" TypeMdid="0.23.1.0"/>
              </dxl:NLJIndexParamList>
            </dxl:NestedLoopJoin>
          </dxl:Aggregate>
        </dxl:GatherMotion>
      </dxl:Aggregate>
    </dxl:Plan>
  </dxl:Thread>
</dxl:DXLMessage>
